MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Power Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When do we use conduit pipe in the transmission of power? |
| A. | Unsheathed cables |
| B. | Armoured cables |
| C. | PVC sheathed cables |
| D. | All of the mentioned |
| Answer» B. Armoured cables | |
| 2. |
Reactive power requirement of a power transmission system depends on __ |
| A. | Power angle δ |
| B. | |Vs|-|Vr| |
| C. | Vs |
| D. | Vr |
| Answer» C. Vs | |
| 3. |
Which of the following situations is very useless when the series capacitors to the transmission line are of little use? |
| A. | When the VAR requirement is small |
| B. | When the VAR requirement is large |
| C. | When the VAR requirement is varying |
| D. | Cannot be determined |
| Answer» B. When the VAR requirement is large | |
| 4. |
It is intended to increase the power despatch of the existing transmission line. Then what can be the most appropriate solution for improving it? |
| A. | Installing series capacitors |
| B. | Installing shunt capacitor |
| C. | Installing shunt reactor |
| D. | Installing series reactor |
| Answer» B. Installing shunt capacitor | |
| 5. |
When ______ then the transmission line will act as a distortion less line. |
| A. | RC = GL |
| B. | RG = LC |
| C. | R = G |
| D. | Cannot be determined |
| Answer» B. RG = LC | |
| 6. |
The surge impedance of multiple conductor lines as compared to single line is _______ |
| A. | higher |
| B. | lower |
| C. | same |
| D. | length dependent |
| Answer» C. same | |
| 7. |
If the transmission line is lossless, then its characteristic will be _________ |
| A. | √(L/C) |
| B. | √LC |
| C. | √(L+C) |
| D. | √(C/L) |
| Answer» B. √LC | |
| 8. |
When the transmission line is lousy, then its characteristic impedance will not depend on which of the following? |
| A. | Length |
| B. | Operating frequency |
| C. | Sub synchronous frequency |
| D. | Length and Sub synchronous frequency |
| Answer» E. | |
| 9. |
Surge impedance of a transmission line is the impedance at the time of breakdown of voltage. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Transmission efficiency of a transmission line increases with the _____________ |
| A. | decrease in power factor and voltage |
| B. | increase in power factor and voltage |
| C. | increase in power factor but the decrease in voltage |
| D. | increase in voltage only power factor remains constant |
| Answer» C. increase in power factor but the decrease in voltage | |